silverlight简易播放器

前台代码：

<UserControl x:Class="SilverlightApplication1.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    mc:Ignorable="d"
    d:DesignHeight="300" d:DesignWidth="400">

    <Grid x:Name="LayoutRoot" Background="White">
        <StackPanel >
            <MediaElement Width="600" Height="480" Stretch="Fill" Source="mv/D301.mp4" Autoplay="False" Name="me1" ></MediaElement>
            <ProgressBar Name="pb" Width="600" Height="20" VerticalAlignment="Bottom" Foreground="Red" Background="Black" ></ProgressBar>
            <Button Name="btn1" Width="100" Height="50" Content="确定" Click="btn1_Click"></Button>
        </StackPanel>
       

    </Grid>
</UserControl>

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后台代码：

using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; using System.Windows.Threading; namespace SilverlightApplication1 {     public partial class MainPage : UserControl     {         public MainPage()         {             InitializeComponent();                     }         void dt_Tick(object sender,EventArgs e)         {             pb.Value = me1.Position.TotalMilliseconds;                      }         private void btn1_Click(object sender,RoutedEventArgs e)         {             me1.Play();             double mvlen = me1.NaturalDuration.TimeSpan.TotalMilliseconds; //获得视频的总毫秒数             pb.Minimum = 0;             pb.Maximum = mvlen;             dispatcherTimer dt = new dispatcherTimer();             dt.Interval = TimeSpan.FromMilliseconds(50);             dt.Tick += new EventHandler(dt_Tick);             dt.Start();         }             } }